Perform the indicated operations. Write the resulting polynomial in standard form.(5x2 + 8x + 2) + (7x2 + 7x + 4)
A. 9x2 + 12x + 12
B. 12x2 - 15x + 6
C. 12x2 + 15x - 6
D. 12x2 + 15x + 6
Answer: D
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 8 sin t - cos tFind the body's velocity at time t = ?/4 sec.
A. 
m/sec
B. - 
m/sec
C. 
m/sec
D. - 
m/sec
Mathematics
Solve the compound inequality. Express the solution using interval notation. Graph the solution set.9x - 6 < 3x or -4x ? -12
A. (1, 3)
B. (-?, 1) ? [3, ?)
C. [1, 3]
D. ?
Mathematics
Find the missing angle.
A. 69° B. 77° C. 26° D. 87°
Mathematics
Solve the proportion two different ways. First in decimal form, then in fraction form. Write your answer in lowest terms.
= 
A. 1.4 or 1
B. 2.8 or 2
C. 0.007 or 
D. 0.014 or 
Mathematics